DC-Transformer 257LE-24-SD

Converter can be used in various applications

Key figures

  • ultrawide input voltage range: 10 ... 35 VDC
  • very high efficiency: up to 98%
  • peak input voltage: 37 VDC
  • output voltage / max. output current: 24.0 VDC / 13.0 ADC

Applications

This non-isolated DC/DC buck-boost converter is widely used as the DC-Transformer 257LE and its 24V output at up to 13A short circuit current is used for stabilization of a 24V onboard power grid. The L-Version is designed to start up at about 9VDC and steps up the input voltage to 24V. Hence, supercapacitor powered electrical systems can be discharged to very low values or 12V battery systems can be regulated to 24V appropriately. Customer specific modifications as follows can be realized: 12V output, 13.8V output, 27V output, 36V output up to 55V output.

Features

  • non-isolated DC/DC buck-boost converter
  • robust and climate proof design
  • excellent thermal characteristics
  • permanently no-load and short-circuit proof
  • integrated EMI input and output filter
  • no power derating
  • for ambient temperatures between -40°C / +85°C
  • thermal shutdown at +90°C
  • CC/CV charging characteristic

Product Family

DC-Transformer Input Output Power
251-24-SD 12 ... 36 VDC 24.0 VDC / 11.0 ADC 260 W
251E-28-SD 16 ... 36 VDC 28.0 VDC / 11.0 ADC 300 W
251L-24-SD 10 ... 36 VDC 24.0 VDC / 10.0 ADC 240 W
257E-24-SD 15 ... 35 VDC 24.0 VDC / 15.0 ADC 360 W
257E-28-SD 15 ... 35 VDC 28.0 VDC / 13.0 ADC 360 W
257LE-24-SD 10 ... 35 VDC 24.0 VDC / 13.0 ADC 300 W
257LE1-29 6 ... 28 VDC 29.0 VDC / 6.5 ADC 180 W
257LEX-12-SD 7 ... 35 VDC 12.0 VDC / 20.0 ADC 240 W
257LEX-24-SD 7 ... 35 VDC 24.0 VDC / 8.0 ADC 200 W
258E-24 15 ... 58 VDC 24.0 VDC / 13.0 ADC 300 W
258E-50 20 ... 63 VDC 50.4 VDC / 10.0 ADC 500 W
258E1-27.5-On 15 ... 58 VDC 27.5 VDC / 8.0 ADC 220 W